From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6EF001B87C3 for ; Tue, 14 Jan 2025 06:46:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736837212; cv=none; b=ZJjCbRjihuc32YECQVTB0hNYWLc7/KzuYPhFuStSH4tkX4HNNQYurM3oIfzUgDW68jfIli/dPK5UiiwJoFgqUxTsRHF5HmbccRvKRktyDQstEo9akwaMVG4KaEAxaYsjKYE9716C1K4g9R8QoAxQMCyMv8L48W8P9hFFUs3YNzM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736837212; c=relaxed/simple; bh=TqrLAyK+frmW2VUGJNYK/FHLAowtRCPz4yfcHs590P0=; h=Date:To:From:Subject:Message-Id; b=OOzQhB3ttRX07m5+H4BIHAhgF8L/eoiCa46e+uHizMMshQ4ZQKcIul4Gvq/faG5lv6mL0BgzI8FeAHjZmvmrn4GjFfEpDXf/AU6+eH8hUR/sPiWMYwUdsr3y2qcgHX4UgB0Nua4y1h/LdHULHS45QcKTaEvt/2Ik067fsFxZm5o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=wHSWihuF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="wHSWihuF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45B34C4CEDD; Tue, 14 Jan 2025 06:46:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1736837212; bh=TqrLAyK+frmW2VUGJNYK/FHLAowtRCPz4yfcHs590P0=; h=Date:To:From:Subject:From; b=wHSWihuFE2knr5SsO34/BakyCo+nEDtMnGw0/M0o/v/qGbL0aXA0ehEq1SWzqvXPx keXAO6+jhSBYy7eUfzCBKlOG7zik7hf8uj9rVGPoCtcygifgLSLmEcbMSvMcj7xBmx xiW7BchE1BeGzrs+fYkLu+/CxlLq2efW4VgqSUyY= Date: Mon, 13 Jan 2025 22:46:51 -0800 To: mm-commits@vger.kernel.org,corbet@lwn.net,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] docs-admin-guide-mm-damon-usage-document-damos-filter-allow-sysfs-file.patch removed from -mm tree Message-Id: <20250114064652.45B34C4CEDD@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: Docs/admin-guide/mm/damon/usage: document DAMOS filter 'allow' sysfs file has been removed from the -mm tree. Its filename was docs-admin-guide-mm-damon-usage-document-damos-filter-allow-sysfs-file.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: SeongJae Park Subject: Docs/admin-guide/mm/damon/usage: document DAMOS filter 'allow' sysfs file Date: Thu, 9 Jan 2025 09:51:26 -0800 Update DAMON usage document for the newly added 'allow' sysfs file for DAMOS filters. Link: https://lkml.kernel.org/r/20250109175126.57878-11-sj@kernel.org Signed-off-by: SeongJae Park Cc: Jonathan Corbet Signed-off-by: Andrew Morton --- Documentation/admin-guide/mm/damon/usage.rst | 33 +++++++++-------- 1 file changed, 19 insertions(+), 14 deletions(-) --- a/Documentation/admin-guide/mm/damon/usage.rst~docs-admin-guide-mm-damon-usage-document-damos-filter-allow-sysfs-file +++ a/Documentation/admin-guide/mm/damon/usage.rst @@ -83,7 +83,7 @@ comma (","). │ │ │ │ │ │ │ │ │ 0/target_metric,target_value,current_value │ │ │ │ │ │ │ :ref:`watermarks `/metric,interval_us,high,mid,low │ │ │ │ │ │ │ :ref:`filters `/nr_filters - │ │ │ │ │ │ │ │ 0/type,matching,memcg_id + │ │ │ │ │ │ │ │ 0/type,matching,memcg_id,allow │ │ │ │ │ │ │ :ref:`stats `/nr_tried,sz_tried,nr_applied,sz_applied,sz_ops_filter_passed,qt_exceeds │ │ │ │ │ │ │ :ref:`tried_regions `/total_bytes │ │ │ │ │ │ │ │ 0/start,end,nr_accesses,age,sz_filter_passed @@ -406,13 +406,14 @@ number (``N``) to the file creates the n to ``N-1``. Each directory represents each filter. The filters are evaluated in the numeric order. -Each filter directory contains six files, namely ``type``, ``matcing``, -``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``. To ``type`` -file, you can write one of five special keywords: ``anon`` for anonymous pages, -``memcg`` for specific memory cgroup, ``young`` for young pages, ``addr`` for -specific address range (an open-ended interval), or ``target`` for specific -DAMON monitoring target filtering. Meaning of the types are same to the -description on the :ref:`design doc `. +Each filter directory contains seven files, namely ``type``, ``matching``, +``allow``, ``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``. +To ``type`` file, you can write one of five special keywords: ``anon`` for +anonymous pages, ``memcg`` for specific memory cgroup, ``young`` for young +pages, ``addr`` for specific address range (an open-ended interval), or +``target`` for specific DAMON monitoring target filtering. Meaning of the +types are same to the description on the :ref:`design doc +`. In case of the memory cgroup filtering, you can specify the memory cgroup of the interest by writing the path of the memory cgroup from the cgroups mount @@ -422,25 +423,29 @@ specify the start and end address of the you can specify the index of the target between the list of the DAMON context's monitoring targets list to ``target_idx`` file. -You can write ``Y`` or ``N`` to ``matching`` file to filter out pages that does -or does not match to the type, respectively. Then, the scheme's action will -not be applied to the pages that specified to be filtered out. +You can write ``Y`` or ``N`` to ``matching`` file to specify whether the filter +is for memory that matches the ``type``. You can write ``Y`` or ``N`` to +``allow`` file to specify if applying the action to the memory that satisfies +the ``type`` and ``matching`` should be allowed or not. For example, below restricts a DAMOS action to be applied to only non-anonymous pages of all memory cgroups except ``/having_care_already``.:: # echo 2 > nr_filters - # # filter out anonymous pages + # # disallow anonymous pages echo anon > 0/type echo Y > 0/matching + echo N > 0/allow # # further filter out all cgroups except one at '/having_care_already' echo memcg > 1/type echo /having_care_already > 1/memcg_path echo Y > 1/matching + echo N > 1/allow Refer to the :ref:`DAMOS filters design documentation -` for more details including when each of the -filters are supported and differences on stats. +` for more details including how multiple filters +of different ``allow`` works, when each of the filters are supported, and +differences on stats. .. _sysfs_schemes_stats: _ Patches currently in -mm which might be from sj@kernel.org are docs-mm-damon-design-add-monitoring-parameters-tuning-guide.patch docs-mm-damon-add-an-example-monitoring-intervals-tuning.patch docs-admin-guide-mm-damon-usage-fix-and-add-missing-damos-filter-sysfs-files-on-files-hierarchy.patch docs-admin-guide-mm-damon-start-update-snapshot-example.patch mm-damon-explain-effective-quota-on-kernel-doc-comment.patch